Improvement in plows



G. WATT.

Plow. y

No. 19,321. Y Patented Feb. 9, i858.

UNITED STATES PATENT OFFICE.

GEORGE WATT, OF RICHMOND, VIRGINIA.

IMPROVEM ENT IN PLOWS.

Specification forming part of Letters Patent No. 19, 321, dated February9, 1858.

To all whom it may concern Be it known that I, GEORGE WATT,0` Richmond,in the county of Henrico and State. of Virginia, have invented a new anduseful Improvement in Plows; and I do hereby declare that the followingis afull, clear, and exact description ofthe construction and operationof the same, reference being` had to the annexed drawingsfoiming partot" this speci lic-ation, in which- Figure l is a mold-board elevationof plow. Fig.2 is a landside elevation. Fig. 3 is a front view, showingthe curve of landside.

Similar characters of relerence denote the same part.

The nature of in v invention consists in constructing both mold-boardand landside of cylindrical surfaces of equal diameters, the turn of themold-board commencing from the eX- treme point, and the cutting-edgebeing determined by the intersection ofthe said cylindrical surfaces,the mold-board having itsconcavity outward and the landside the reverse,said construction being combined with a curved standard hereinafter tobe described.

In the drawings, M is the mold-board, L the landside, S the standard,and B the beam.

The mold-board turns outward in a regular cylindrical surface from itsintersection with the share, the elements of the cylinder beingrespectively parallel to this line ofintersection.

The landside L is a regular cylindrical surface of the same diameter asthe cylinder of which the mold-board forms a portion, the front oreuttin g edge of the plow being formed by the intersection of these twosurfaces.

The standard S curves landward from the upper extremity of thecylindrical landside, being cut away and hollowed out on the moldboardside to prevent clogging, as described in my patent of December 9, 1856,reissued November l0, 1857.

The l indside L, being of cylindrical form, passes obliquely under thesoil, by which the plow is rendered much more steady, as it is preventedfrom rising at the heel or tiltingover. It also saves the point frombevelin g from wear. It moreover leaves an overhanging arch ofsoil,which is more easily turned in making the succeeding furrow.

Owing to the perfect cylindrical surfaces of mold-board and landside andtheir intersection along the cutting-edge the soil is gradually turnedover from the extreme point npward, by which a considerable saving indraft is effected.

TheI curving of the standard as shown in the drawings permits the risingearth to pass off without clogging under the beam.

I do notclaim, ofitself, the inclination of the landside toward themold-board for the purpose of leaving soil overhanging the furrow, assuch device, broadly considered, is not new; but

W hat I do claim, and desire to secure by Letters Patent, isu

Constructing mold-board andlandside of cy li ndrical surfaces of equaldiameters, intersecting along the cnttingedge of the plow, inconibination with the curved standard S, the whole being constructedsubstantially as and for the purposes hereinbefore set forth.

In testimony whereof [have hereunto signed my name before twosubscribing witnesses.

GEO. WATT.

Witnesses:

WM. S. SUMNEE, G. W. DYER.

